A central theme of our research program is control of cell proliferation and differentiation with emphasis on mammalian development and compromised regulation that is linked to disease. We pioneered characterization of transcriptional regulation that mediates cell cycle control. Currently, the laboratory is investigating gene regulatory mechanisms that control competency for cell cycle progression at the G1/S phase transition in normal and tumor cells, as well as in human embryonic stem cells that have a characteristic abbreviated pluripotent cell cycle.
A second field in which our laboratory is making a major impact is skeletal biology, where we established the foundation for addressing bone tissue specific gene expression. Current initiatives include microRNA-mediated control and molecular, cellular, biochemical and in vivo genetic parameters of skeletal development and bone remodeling, aberrations that accompany the onset and progression of skeletal disease, as well as perturbations related to breast and prostate cancer metastasis to bone.
Our research group has been instrumental in defining functional relationships between subnuclear organization of regulatory proteins and gene expression. We have made important contributions to mechanisms that mediate combinatorial organization and assembly of regulatory machinery for gene expression in nuclear microenvironments. Currently, we are examining how nuclear architecture supports epigenetic control of cell fate and lineage commitment in biological control and cancer. The architectural parameters of regulatory networks that are obligatory for fidelity of gene expression are being clarified as a basis for therapeutic strategies with high specificity and reduced off target effects.